I see two main considerations when selecting between a PIC and a PLC:

1. Flexibility vs. simplicity.  A PLC is essentially a microcontroller with
simplified hardware and software interfaces.  PLCs are simpler to program,
but are often quite limited in their abilities.  PICs and other
microcontrollers are much more robust, but typically require more
development time.

2. Cost and volume.  Microcontrollers are much less expensive than PLC's.
Thus, if you need one traffic controller, you may be better off going with a
PLC (the extra expense of the PLC will be offset by the savings in
development).  If you need 30,000, it will probably be less costly to use a
PIC.

Jen

> -----Original Message-----
> From: pic microcontroller discussion list
> [mailto:PICLIST@MITVMA.MIT.EDU]On Behalf Of Gabriel Caffese
> Sent: Monday, July 08, 2002 1:08 PM
> To: PICLIST@MITVMA.MIT.EDU
> Subject: [PIC]: When to use PIC or PLC ??
>
>
> Hello everyone,
>
>    I would like you to tell me wich are the the most
> important reasons why
> a PIC microcntroller would (or would not) be able to replace a PLC.
>    For example, supose the need for replacing the semaphore
> PLC control in
> a city.
>
>    Thanks,
>         Gabriel.-
>
> --
> http://www.piclist.com hint: The PICList is archived three different
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>
>

--
http://www.piclist.com hint: The PICList is archived three different
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